1639651921152 has 432 divisors, whose sum is σ = 5199406783872. Its totient is φ = 449089044480.

The previous prime is 1639651921147. The next prime is 1639651921157. The reversal of 1639651921152 is 2511291569361.

It is an interprime number because it is at equal distance from previous prime (1639651921147) and next prime (1639651921157).

It is a junction number, because it is equal to n+sod(n) for n = 1639651921095 and 1639651921104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639651921157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 767267028 + ... + 767269164.

Almost surely, 2^{1639651921152} is an apocalyptic number.

1639651921152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1639651921152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2599703391936).

1639651921152 is an abundant number, since it is smaller than the sum of its proper divisors (3559754862720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1639651921152 is an equidigital number, since it uses as much as digits as its factorization.

1639651921152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322 (or 2249 counting only the distinct ones).

The product of its digits is 874800, while the sum is 51.

The spelling of 1639651921152 in words is "one trillion, six hundred thirty-nine billion, six hundred fifty-one million, nine hundred twenty-one thousand, one hundred fifty-two".